Cooling water circulating filtering device and method for nuclear power generation

Abstract

The invention relates to the technical field of nuclear energy, in particular to a nuclear power generation cooling water circulation filtering device and method.The nuclear power generation cooling water circulation filtering device comprises a mounting cover and supporting legs evenly arranged at the lower end of the mounting cover in the circumferential direction, and a water inlet pipe and a water outlet pipe are arranged in the middle of the top end and the middle of the bottom end of the mounting cover correspondingly and communicate with the interior of the mounting cover; an operation opening is formed in the side wall of the mounting cover, a protective door for closing the operation opening is further slidably mounted on the side wall of the mounting cover, and a flow guide device is further arranged in the mounting cover; in the cooling water filtering process, the rotating pipe drives the cleaning brush to rotate, the cleaning brush enables impurities on the filtering plate to enter the dirt collecting box through guiding of the spiral strip, the impurities filtered on the filtering plate are collected, the purpose of automatically cleaning the impurities on the filtering plate is achieved, the impurities are collected in a unified mode, and the cleaning efficiency is improved. The secondary pollution of the filtered impurities to the device is prevented.

Description

Technical Field

[0001] The present application relates to the field of nuclear energy technology, and in particular to a nuclear power generation cooling water circulation filtering device and method. Background Art

[0002] As nuclear energy becomes increasingly important in the energy sector, the design and optimization of nuclear-grade cooling water systems have become an important part of ensuring the stable operation of nuclear reactors. They can cool the large amount of additional heat generated in nuclear reactions. Due to the huge amount of water required for cooling and the high quality requirements of the water flow, precipitation and filtration are required before input cooling to prevent microorganisms, particulate matter and impurities in the water flow from adhering to the pipes and causing blockages in the pipes.

[0003] Therefore, it is necessary to filter the cooling water of nuclear power generation, such as a cooling water filter device for nuclear power generation with publication number CN220811929U. In the above-mentioned prior art, a filter belt that is driven by a motor to circulate is installed on the filter frame, and a guide plate is installed on the upper end of the filter frame. The guide plate is located on the inner side of the filter belt, and a diversion component is arranged on the filter frame. The beneficial effects are: on the basis of the existing filtering device, a circulating filter belt is designed to avoid continuous impact of water flow on the fixed position of the filter belt, and the cleaning component is used to ensure the stable filtering efficiency of the water flow. At the same time, a guide plate and a diversion component are arranged on the inner side of the filter belt, so as to realize the timely discharge of the filtered water flow to avoid aggregation, forming a structure for separating and filtering the water flow and the filter screen, and cooperating with the circulating rotation of the filter screen to realize convenient and efficient cleaning of the filter screen.

[0004] However, the above-mentioned prior art still has some defects when it comes to circulating filtration of cooling water for nuclear power generation: 1. The above-mentioned prior art filters cooling water through a circulating filter belt, and then blows out impurities adhering to the filter belt through a fan, but the above-mentioned prior art lacks a device for collecting impurities. After the impurities adhering to the filter fall off by themselves or are blown out by the fan, they may exist in various parts of the device, causing secondary pollution to the device, affecting the use of the device, and being difficult to clean.

[0005] 2. The above-mentioned prior art avoids the continuous impact of water flow on the fixed position of the filter belt by means of a circulating rotating crawler belt, and at the same time, a guide plate and a diversion component are arranged on the inner side of the filter belt, so as to discharge the filtered water flow in time and avoid aggregation. However, during long-term use, due to the long-term filtration of the filter belt, the filter belt may be contaminated and lose its filtering effect. At this time, the filter belt needs to be replaced. However, the above-mentioned prior art is troublesome to replace the filter belt or even impossible to replace the filter belt, which has certain defects.

[0006] Based on this, and in accordance with the above-mentioned viewpoints, the existing technology for circulating and filtering cooling water for nuclear power generation still has room for improvement. Summary of the invention

[0007] In order to solve the above technical problems, the present application provides a nuclear power generation cooling water circulation filtration device and method, which adopts the following technical solutions:

[0008] In the first aspect, the present application provides a nuclear power generation cooling water circulation filtration device, including a mounting cover and support legs evenly arranged circumferentially at the lower end of the mounting cover, a water inlet pipe and a water outlet pipe are respectively arranged at the top and the middle of the bottom of the mounting cover, and the water inlet pipe and the water outlet pipe are both connected to the interior of the mounting cover, an operation port is opened on the side wall of the mounting cover, and a protective door for closing the operation port is also slidably installed on the side wall of the mounting cover, and a flow guide device is also arranged inside the mounting cover.

[0009] Preferably, the diversion device includes a rotating sleeve rotatably installed on the lower end of the water inlet pipe and the upper end of the water outlet pipe respectively, the side ends of the rotating sleeve are symmetrically connected to the water inlet pipe and the water outlet pipe respectively corresponding to the water inlet pipe and the water outlet pipe, a control valve is installed on the water inlet branch pipe, the lower end of the water inlet branch pipe is provided with an upper filter cover, the upper end of the water outlet branch pipe is slidably installed with a lower filter cover, and the upper filter cover corresponds to the lower filter cover one by one.

[0010] Preferably, a water filtering device is provided inside the lower filter cover, and the water filtering device includes a mounting ring provided at the upper end of the lower filter cover, a collector tube is installed inside the mounting ring, and a slope inclined downward toward the middle of the collector tube is provided at the lower end of the collector tube, a filter plate is installed at the upper end of the collector tube, a connecting pipe is provided at the lower end of the collector tube, and the connecting pipe is connected to the water outlet branch pipe.

[0011] Preferably, a mixing device is provided inside the lower filter cover, and the mixing device includes an installation port opened on the side wall of the lower filter cover, a dirt collecting box is slidably connected to the installation port, a dirt outlet port is provided at one end of the installation ring, a filter screen is provided at the end of the dirt collecting box facing the lower filter cover, a medicine dispensing box is provided at the lower end of the lower filter cover, the medicine dispensing box is connected to the filter screen side of the dirt collecting box through a guide cover, a connecting pipe is installed on the side wall of the medicine dispensing box facing the connecting pipe, and the connecting pipe connects the medicine dispensing box and the water outlet branch pipe, a filter net is also provided on the connecting pipe, a medicine dispensing port is provided at the upper end of the side wall of the medicine dispensing box facing away from the connecting pipe, and a sealing cover is installed on the medicine dispensing port.

[0012] Preferably, a cleaning device is provided inside the upper filter cover, and the cleaning device includes a mounting seat installed on the upper end of the upper filter cover, a rotating tube is rotatably installed on the lower end of the mounting seat, and the water inlet branch pipe is connected to the rotating tube, and a plurality of groups of arc guide tubes distributed up and down and evenly arranged circumferentially are provided on the outer wall of the lower end of the rotating tube, and the arc guide tube is connected to the rotating tube, and a connecting column is connected to the bottom end of the rotating tube, and a plurality of circumferentially distributed rotating plates are evenly provided at the lower end of the connecting column, a connecting ring is provided at the lower end of the upper filter cover, and the end of the rotating plate away from the connecting column is slidably provided on the upper end of the connecting ring, a cleaning brush is provided at the lower end of the rotating plate, and a connecting shaft is also provided at the bottom end of the connecting column, and a spiral strip is commonly installed between the connecting shaft and the connecting ring, the spiral strip is located on the upper end surface of the filter plate, and the middle part of the spiral strip is rotatably installed on the lower end of the connecting shaft.

[0013] Preferably, the upper filter cover and the lower filter cover are provided with a locking device, and the locking device includes an assembly ring arranged on the outer wall of the lower end of the upper filter cover, and a plurality of mounting plates are evenly arranged circumferentially on the side wall of the assembly ring, and a mounting slide groove is provided on the mounting plate, and a sliding ring is slidably connected to the mounting slide groove, and a sliding handle is installed on the side end of the sliding ring. A plurality of mounting blocks are also evenly arranged circumferentially on the side wall of the lower end of the assembly ring, and a positioning frame is rotatably installed on the mounting block, and a positioning hook is provided at the lower end of the positioning frame. A positioning ring is provided at the upper end of the outer wall of the lower filter cover, and the upper end of the positioning frame is inclined toward the outer side of the upper filter cover, and a sliding hole is provided on the inclined part, and the assembly ring slides inside the sliding hole.

[0014] Preferably, a connecting device is provided at the lower end of the lower filter cover, and the connecting device includes a rotating plate installed on a rotating sleeve located at the upper end of the water outlet pipe, and a rotating ring is connected to the periphery of the rotating plate, and a plurality of adjusting sleeves are provided at the upper end of the rotating plate, and the adjusting sleeves are located in the middle of the lower end of the lower filter cover, and a sliding sleeve is installed at the lower end of the lower filter cover, and the sliding sleeve is slidably connected to the adjusting sleeve, and a plurality of sliding cylinders are evenly installed circumferentially at the lower end of the lower filter cover, and sliding columns respectively connected to the sliding cylinders for sliding are installed on the rotating plate, and a connecting spring is provided inside the sliding cylinder, and the connecting spring connects the sliding cylinder and the sliding column.

[0015] Preferably, the upper end of the rotating plate is also provided with an adjusting device, the adjusting device includes a plurality of adjusting frames installed on the upper end of the rotating plate, and the positions of the adjusting frames correspond to the adjusting sleeves respectively, a gear shaft is rotatably installed on the upper end of the adjusting frame, an adjusting gear is installed on the end of the gear shaft facing the adjusting sleeve, an adjusting rack is provided on the sliding cylinder next to the adjusting frame, and the adjusting gear and the adjusting rack are meshed with each other, a plurality of mounting frames are also provided on the upper end of the rotating plate, and the positions of the mounting frames correspond to the adjusting sleeves respectively, an L-shaped bar is rotatably installed on the mounting frame, a locking spring is connected to the rotating plate at the lower end of the L-shaped bar, a locking protrusion is provided on the upper end of the L-shaped bar, a locking tooth is provided on the sliding cylinder next to the mounting frame, and the locking protrusion cooperates with the locking tooth.

[0016] In a second aspect, the present application also provides a method for circulating and filtering cooling water for nuclear power generation, the filtering method comprising the following steps:

[0017] S1: Open the protective door, turn the rotating ring to rotate the rotating plate, and turn the lower filter cover of the filter plate to be replaced to the side of the operation port. Make sure that the control valve facing the operation port is closed at this time, push the sliding handle to slide the sliding ring upward, and then press down the lower end of the L-shaped bar corresponding to the lower filter cover, and the lower filter cover moves downward;

[0018] S2: Remove the filter plate in the lower filter cover, install a new filter plate on the upper end of the manifold, turn the gear shaft clockwise facing the adjustment frame to move the lower filter cover upward, and finally make the positioning hook hook the positioning ring to connect the upper filter cover with the lower filter cover;

[0019] S3: Open the control valve to allow cooling water to flow out from the arc-shaped guide pipe, and the cleaning brush is driven to rotate through the rotating pipe. The impurities on the filter plate are guided by the spiral strips and finally enter the dirt collecting box from the dirt outlet. When the dirt collecting box is full of impurities, the dirt collecting box can be taken out by sliding and replaced with an empty one.

[0020] S4: When the water quality needs to be improved, open the sealing cover, add the agent for improving the filtered water quality from the dispensing port, close the sealing cover, and the water in the dispensing box and the impurities enter the scale collecting box from the guide cover, and bring the agent into the water outlet pipe through the connecting pipe to improve the water quality.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. In the process of filtering cooling water, the present invention drives the cleaning brush to rotate through the rotating tube, and the cleaning brush guides the impurities on the filter plate into the dirt collecting box through the guidance of the spiral strips to collect the impurities filtered on the filter plate, so as to achieve the purpose of automatically cleaning the impurities on the filter plate, and uniformly collect the impurities to prevent the filtered impurities from causing secondary pollution to the device.

[0023] 2. When replacing the filter plate, the present invention rotates the lower filter cover of the filter disc to be replaced to the side of the operating port, closes the corresponding control valve and separates the lower filter cover from the upper filter cover to replace the filter plate. After the replacement is completed, the lower filter plate and the upper filter plate are connected again, and the corresponding control valve is opened again. This method of replacing the filter plate does not require shutdown. When the filter plate is replaced, other filter plates are still filtering normally, which ensures uninterrupted filtration. In addition, multiple filter plates improve the filtration efficiency.

[0024] 3. After the medicine is added into the medicine dispensing port, the water in the scale collecting box enters the medicine dispensing box, and the medicine is brought into the water outlet branch pipe through the connecting pipe, thereby improving the overall water quality of nuclear power generation cooling water, effectively controlling the microbial flora, inhibiting the formation of scale, and preventing the erosion of pipeline equipment, thereby achieving the purpose of reducing energy consumption and extending the service life of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 It is a schematic structural diagram of the flow guiding device of the present invention.

[0027] Figure 3 It is a schematic structural diagram of the water filtering device of the present invention.

[0028] Figure 4 It is a structural schematic diagram of the cleaning device of the present invention.

[0029] Figure 5 It is a schematic structural diagram of the mixing device of the present invention.

[0030] Figure 6 It is a structural schematic diagram of the connecting device of the present invention.

[0031] Figure 7 It is a schematic structural diagram of the regulating device of the present invention.

[0032] Figure 8 It is a schematic structural diagram of the locking device of the present invention.

[0033] Explanation of the reference numerals: 11, mounting cover; 12, supporting leg; 13, water inlet pipe; 14, water outlet pipe; 15, operating port; 16, protective door; 2, flow guide device; 21, rotating sleeve; 22, water inlet branch pipe; 23, water outlet branch pipe; 24, control valve; 25, upper filter cover; 26, lower filter cover; 3, water filter device; 31, mounting ring; 32, manifold; 33, filter plate; 34, connecting pipe; 4, cleaning device; 41, mounting seat; 42, rotating pipe; 43, arc guide pipe; 44, connecting column; 45, rotating plate; 46, connecting ring; 47, cleaning brush; 48, connecting shaft; 49, spiral strip; 5, mixing device; 51, mounting port; 52, dirt collection box; 53, dirt outlet; 54, filter screen; 55, dispensing box; 56, deflector; 57, connecting pipe; 58, filter screen; 59, dispensing port; 510, sealing cover; 6, connecting device; 61, rotating plate; 62, rotating ring; 63, adjusting sleeve; 64, sliding sleeve; 65, sliding cylinder; 66, sliding column; 67, connecting spring; 7, adjusting device; 71, adjusting frame; 72, gear shaft; 73, adjusting gear; 74, adjusting rack; 75, mounting frame; 76, L-shaped bar; 77, locking spring; 78, locking protrusion; 79, locking tooth; 8, locking device; 81, assembly ring; 82, mounting plate; 83, mounting slide groove; 84, sliding ring; 85, sliding handle; 86, mounting block; 87, locking frame; 88, locking hook; 89, locking ring; 810, sliding hole. DETAILED DESCRIPTION

[0034] The following is combined with Figures 1 to 8 This application is described in further detail.

[0035] The embodiment of the present application discloses a nuclear power generation cooling water circulation filtering device and method, which can filter and collect impurities in the cooling water, and improve the cooling water quality by adding chemicals.

[0036] Embodiment 1:

[0037] refer to Figure 1 A nuclear power generation cooling water circulation filtering device comprises a mounting cover 11 and supporting legs 12 uniformly arranged circumferentially at the lower end of the mounting cover 11, a water inlet pipe 13 and a water outlet pipe 14 are respectively arranged at the middle of the top and bottom of the mounting cover 11, and the water inlet pipe 13 and the water outlet pipe 14 are both connected to the inside of the mounting cover 11, cooling water enters the device through the water inlet pipe 13, and is discharged from the water outlet pipe 14 after filtering, an operation port 15 is opened on the side wall of the mounting cover 11, and a protective door 16 for closing the operation port 15 is also slidably installed on the side wall of the mounting cover 11 to protect the internal device of the mounting cover 11, and a guide device 2 for guiding the cooling water filtration is also arranged inside the mounting cover 11.

[0038] When filtering nuclear power generation cooling water, the cooling water enters through the water inlet pipe 13 , is guided by the flow guide device 2 for filtration, and is finally discharged from the water outlet pipe 14 .

[0039] refer to Figure 2 , is a schematic diagram of the structure of the flow guide device 2 of the present invention, the flow guide device 2 includes a rotating sleeve 21 rotatably installed at the lower end of the water inlet pipe 13 and the upper end of the water outlet pipe 14, the side ends of the rotating sleeve 21 correspond to the water inlet pipe 13 and the water outlet pipe 14 respectively, and are symmetrically connected to the water inlet branch pipe 22 and the water outlet branch pipe 23 in the circumferential direction, which are used to divert cooling water to ensure that the cooling water can be filtered normally when the cooling water flow is too large. A control valve 24 is installed on the water inlet branch pipe 22 to control the cooling water flow in the water inlet branch pipe 22, and an upper filter cover 25 is provided at the lower end of the water inlet branch pipe 22, and a lower filter cover 26 is slidably installed at the upper end of the water outlet branch pipe 23, and the upper filter cover 25 corresponds to the lower filter cover 26 one by one. After the upper filter cover 25 and the lower filter cover 26 are in contact and connected with each other, a sealed area is formed inside.

[0040] After entering the water inlet pipe 13 , the cooling water is divided into the upper filter cover 25 and the lower filter cover 26 through the water inlet branch pipe 22 , and is discharged to the water outlet branch pipe 23 after being filtered, and then merged into the water outlet pipe 14 for discharge.

[0041] refer to Figure 3 , is a schematic diagram of the structure of the water filter device 3 of the present invention, the water filter device 3 is arranged inside the lower filter cover 26, the water filter device 3 includes a mounting ring 31 arranged at the upper end of the lower filter cover 26, a collector tube 32 is installed inside the mounting ring 31, and the lower end of the collector tube 32 is provided with an inclined surface inclined downward toward the middle of the collector tube 32, a filter plate 33 is installed at the upper end of the collector tube 32, and the filter plate 33 is detachable, so as to facilitate the replacement of the filter plate 33, a connecting pipe 34 is arranged at the lower end of the collector tube 32, and the connecting pipe 34 is connected to the water outlet branch pipe 23, and the cooling water is filtered by the filter plate 33 and then flows into the connecting pipe 34 through the collector tube 32.

[0042] After the cooling water enters between the upper filter cover 25 and the lower filter cover 26 , it is filtered by the filter plate 33 and then flows downward into the manifold 32 , and then flows into the connecting pipe 34 through the manifold 32 , and finally flows into the outlet branch pipe 23 for discharge.

[0043] Embodiment 2:

[0044] refer to Figure 4On the basis of the first embodiment, in order to clean the impurities on the filter plate 33, in the specific embodiment of the present scheme, a cleaning device 4 is arranged inside the upper filter cover 25, and the cleaning device 4 includes a mounting seat 41 mounted on the upper end of the upper filter cover 25, and a rotating tube 42 is rotatably mounted on the lower end of the mounting seat 41, and the water inlet branch pipe 22 is connected to the rotating tube 42, and a plurality of groups of arc guide tubes 43 distributed up and down and evenly arranged circumferentially are arranged on the outer side wall of the lower end of the rotating tube 42, and the arc guide tube 43 is connected to the rotating tube 42. When the cooling water is discharged from the arc guide tube 43, the rotating tube 42 is rotated, and the bottom end of the rotating tube 42 is connected to a connecting column 44, and the lower end of the connecting column 44 is evenly provided with a plurality of circumferentially distributed arc guide tubes 43. The rotating plate 45 of the cloth, the rotating tube 42 rotates and drives the rotating plate 45 to rotate through the connecting column 44. A connecting ring 46 is provided at the lower end of the upper filter cover 25, and the end of the rotating plate 45 away from the connecting column 44 is slidably arranged on the upper end of the connecting ring 46. A cleaning brush 47 is provided at the lower end of the rotating plate 45. The rotating plate 45 rotates to make the cleaning brush 47 rotate on the upper surface of the filter plate 33 to clean impurities. A connecting shaft 48 is also provided at the bottom end of the connecting column 44. A spiral strip 49 is installed between the connecting shaft 48 and the connecting ring 46. The spiral strip 49 is located on the upper end surface of the filter plate 33, and the middle part of the spiral strip 49 is rotatably installed on the lower end of the connecting shaft 48. Impurities are cleaned to the edge of the filter plate 33 under the guidance of the spiral strip 49.

[0045] The cooling water flows through the water inlet branch pipe 22, the rotating pipe 42 and the arc-shaped guide pipe 43 in sequence, and is discharged from the arc-shaped guide pipe 43, causing the rotating pipe 42 to rotate, and then driving the rotating plate 45 to rotate around the connecting column 44 through the connecting column 44. At this time, the cleaning brush 47 rotates on the upper surface of the filter plate 33 to clean impurities, and the impurities are cleaned to the edge of the filter plate 33 under the guidance of the spiral bars 49.

[0046] refer to Figure 5, is a schematic diagram of the structure of the mixing device 5 of the present invention. The lower filter cover 26 is provided with a mixing device 5 for collecting impurities and mixing the agent with cooling water. The mixing device 5 includes a mounting port 51 provided on the side wall of the lower filter cover 26. A dirt collecting box 52 is slidably connected to the mounting port 51 for collecting and cleaning impurities at the edge of the filter plate 33. A dirt outlet 53 is provided at one end of the mounting ring 31. Impurities at the edge of the filter plate 33 pass through the dirt outlet 53 and fall into the dirt collecting box 52. A filter screen 54 is provided at one end of the dirt collecting box 52 facing the lower filter cover 26. The cooling water entering the dirt collecting box 52 together with the impurities is filtered out from the filter screen 54. A medicine dispensing box 55 is provided at the lower end of the lower filter cover 26. The medicine dispensing box 55 and the filter screen 54 of the dirt collecting box 52 are connected. One side is connected through a guide cover 56, and the cooling water is filtered out from the filter screen 54 and enters the medicine dispensing box 55 through the guide cover 56. A connecting pipe 57 is installed on the side wall of the medicine dispensing box 55 facing the connecting pipe 57, and the connecting pipe 57 connects the medicine dispensing box 55 and the water outlet branch pipe 23. A filter net 58 is also provided on the connecting pipe 57, so that the medicine in the medicine dispensing box 55 is mixed with the cooling water in the medicine dispensing box 55 and then enters the water outlet branch pipe 23 through the connecting pipe 57. The filter net 58 prevents solid medicine from directly entering the water outlet branch pipe 23 and causing pipeline blockage. A dispensing port 59 is opened at the upper end of the side wall of the medicine dispensing box 55 away from the connecting pipe 57, and the medicine for improving water quality is added from the dispensing port 59. A sealing cover 510 is installed on the dispensing port 59 to close the dispensing port 59.

[0047] After the impurities are cleaned to the edge of the filter plate 33 under the guidance of the spiral strips 49, the cleaning brush 47 continues to clean the impurities to the dirt outlet 53 and falls into the dirt collecting box 52. When the impurities in the dirt collecting box 52 are fully collected, the dirt collecting box 52 can be slid out and replaced with a new one.

[0048] While the dirt collecting box 52 collects impurities, the cooling water that enters the dirt collecting box 52 together with the impurities is filtered out from the filter screen 54. After being filtered out from the filter screen 54, the cooling water enters the medicine dispensing box 55 through the guide cover 56, so that the medicine for improving water quality added from the medicine dispensing port 59 is mixed with the cooling water in the medicine dispensing box 55, and then enters the water outlet branch pipe 23 through the connecting pipe 34. At the same time, the filter net 58 prevents solid medicine from directly entering the water outlet branch pipe 23 and causing pipeline blockage.

[0049] Embodiment three:

[0050] refer to Figure 6On the basis of the first and second embodiments, in order to facilitate the replacement of the filter plate 33, in the specific embodiment of the present scheme, a connecting device 6 is provided at the lower end of the lower filter cover 26, and the connecting device 6 includes a rotating plate 61 installed on the rotating sleeve 21 located at the upper end of the water outlet pipe 14, and a rotating ring 62 is connected to the outer periphery of the rotating plate 61. By rotating the rotating ring 62 to rotate the rotating plate 61, the lower filter cover 26 where the filter plate 33 needs to be replaced is rotated to the front of the operation port 15, so as to facilitate the replacement of the filter plate 33. A plurality of adjusting sleeves 63 are provided at the upper end of the rotating plate 61, and the adjusting sleeves 63 are located in the middle of the lower end of the lower filter cover 26. A sliding sleeve 64 is installed at the lower end of the lower filter cover 26, and the sliding sleeve 64 is slidably connected to the adjusting sleeve 63. The sliding sleeve 64 is slid to slide the lower filter cover 26 up and down to separate the upper filter cover 25 and the lower filter cover 26 to replace the filter plate 33. A plurality of sliding cylinders 65 are evenly installed circumferentially at the lower end of the lower filter cover 26. Sliding columns 66 that are slidably connected to the sliding cylinders 65 are installed on the rotating plate 61. A connecting spring 67 is arranged inside the sliding cylinder 65. The connecting spring 67 connects the sliding cylinder 65 and the sliding column 66 to prevent the sliding speed from being too fast to damage the device when the lower filter cover 26 slides downward.

[0051] When replacing the filter plate 33, first rotate the rotating ring 62 to rotate the rotating plate 61, rotate the lower filter cover 26 of the filter plate 33 to be replaced to the front of the operating port 15, and then slide the sliding sleeve 64 downward to slide the lower filter cover 26 downward to separate the upper filter cover 25 and the lower filter cover 26. At this time, replace the filter plate 33 from between the lower filter cover 26 and the upper filter cover 25. After the replacement is completed, slide the sliding sleeve 64 upward again to slide the lower sliding sleeve 64 upward to connect the upper filter cover 25 with the lower filter cover 26.

[0052] refer to Figure 7, is a schematic diagram of the structure of the adjusting device 7 of the present invention. The upper end of the rotating plate 61 is also provided with an adjusting device 7 for moving the lower filter cover 26 up and down. The adjusting device 7 includes a plurality of adjusting frames 71 installed on the upper end of the rotating plate 61, and the positions of the adjusting frames 71 correspond to the adjusting sleeves 63 respectively. A gear shaft 72 is rotatably installed on the upper end of the adjusting frame 71. An adjusting gear 73 is installed on one end of the gear shaft 72 facing the adjusting sleeve 63. The gear shaft 72 is rotated to rotate the adjusting gear 73. When the gear shaft 72 is rotated, the gear shaft 72 can be rotated in one direction by a ratchet wrench. An adjusting rack 74 is provided on the sliding cylinder 65 next to the adjusting frame 71, and the adjusting gear 73 and the adjusting rack 74 are meshed with each other, and the adjusting gear 73 rotates to make the adjusting rack 74 move up and down, thereby making the sliding sleeve 64 move up and down. A plurality of mounting brackets 75 are also provided at the upper end of the rotating plate 61, and the positions of the mounting brackets 75 correspond to the adjusting sleeve 63 respectively. An L-shaped bar 76 is rotatably installed on the mounting bracket 75, and a locking spring 77 is connected to the rotating plate 61 at the lower end of the L-shaped bar 76, and a locking protrusion 78 is provided at the upper end of the L-shaped bar 76. A locking tooth 79 is provided on the sliding cylinder 65 next to the mounting bracket 75, and the locking protrusion 78 cooperates with the locking tooth 79 to limit the sliding sleeve 64 from sliding downward. At the same time, the locking spring 77 keeps the locking protrusion 78 in a state of restricting the locking tooth 79.

[0053] When separating the upper filter cover 25 and the lower filter cover 26, press down the lower end of the L-shaped strip 76 to rotate on the mounting frame 75, thereby disengaging the locking protrusion 78 from the locking tooth 79. At this time, the lower filter cover 26 slides downward under the action of gravity, and the filter plate 33 can be replaced.

[0054] After the filter plate 33 is replaced and the lower filter cover 26 is connected to the lower filter cover 26, the gear shaft 72 is rotated unidirectionally by a ratchet wrench, and then the sliding sleeve 64 is slid upward by adjusting the engagement between the adjusting gear 73 and the adjusting rack 74, so that the lower filter cover 26 slides upward, and finally the lower filter cover 26 is connected to the upper filter cover 25, and during the sliding process, the locking spring 77 keeps the locking protrusion 78 in a state of restricting the locking tooth 79 to prevent the sliding cylinder 65 from sliding downward.

[0055] refer to Figure 8, is a schematic diagram of the structure of the locking device 8 of the present invention, wherein the upper filter cover 25 and the lower filter cover 26 are provided with a locking device 8 for fixing the lower filter cover 26 to the lower end of the upper filter cover 25, and the locking device 8 comprises an assembly ring 81 provided on the outer wall of the lower end of the upper filter cover 25, and a plurality of mounting plates 82 are evenly arranged on the side wall of the assembly ring 81 in a circumferential direction, and an installation slide groove 83 is provided on the mounting plate 82, and a sliding ring 84 is slidably connected to the installation slide groove 83, and a sliding handle 85 is installed on the side end of the sliding ring 84, and the sliding ring 84 is slid up and down by the sliding handle 85 A plurality of mounting blocks 86 are evenly arranged on the side wall at the lower end of the assembly ring 81 in the circumferential direction, and a positioning frame 87 is rotatably mounted on the mounting block 86. A positioning hook 88 is arranged at the lower end of the positioning frame 87, and a positioning ring 89 is arranged at the upper end of the outer wall of the lower filter cover 26. The mounting block 86 is kept in a vertical state under the action of a torsion spring (not shown in the figure) inside the positioning frame 87, so that the positioning hook 88 hooks the positioning ring 89, and the upper end of the positioning frame 87 is inclined toward the outer side of the upper filter cover 25, and a sliding hole 810 is opened in the inclined part, and the assembly ring 81 slides inside the sliding hole 810.

[0056] When the upper filter cover 25 is connected to the lower filter cover 26, the locking hook 88 hooks the locking ring 89 to connect the lower filter cover 26 to the lower end of the upper filter cover 25. When it is necessary to separate the upper filter cover 25 and the lower filter cover 26 to replace the filter plate 33, the sliding handle 85 is pushed upward to make the assembly ring 81 slide upward, and then the sliding ring 84 slides upward in the sliding hole 810 to rotate the locking frame 87 to make the locking hook 88 disengage from the locking ring 89. At this time, the upper filter cover 25 can be separated from the lower filter cover 26.

[0057] In addition, the present invention also provides a nuclear power generation cooling water circulation filtering method, the filtering method comprising the following steps:

[0058] S1: Open the protective door 16, rotate the rotating ring 62 to rotate the rotating plate 61, rotate the lower filter cover 26 of the filter plate 33 to be replaced to the side of the operating port 15, ensure that the control valve 24 facing the operating port 15 is closed at this time, push the sliding handle 85 to slide the sliding ring 84 upward, and rotate the locking frame 87 to make the locking hook 88 disengage from the locking ring 89. After the locking hook 88 disengages from the locking ring 89, press down the lower end of the L-shaped strip 76 corresponding to the lower filter cover 26 to make the L-shaped strip 76 rotate on the mounting frame 75, and then disengage the locking protrusion 78 from the locking tooth 79. At this time, the lower filter cover 26 moves downward under the action of gravity.

[0059] S2: Remove the filter plate 33 in the lower filter cover 26 between the upper filter cover 25 and the lower filter cover 26, and install a new filter plate 33 on the upper end of the collector tube 32. After the installation is completed, use a ratchet wrench to turn the gear shaft 72 clockwise facing the adjustment frame 71 to move the lower filter cover 26 upward, and finally make the locking hook 88 hook the locking ring 89 to connect the upper filter cover 25 with the lower filter cover 26.

[0060] S3: After replacing the filter plate 33, open the control valve 24 to allow cooling water to flow out from the arc-shaped guide tube 43, so that the rotating tube 42 rotates, and then drives the rotating plate 45 to rotate around the connecting column 44 through the connecting column 44. At this time, the cleaning brush 47 rotates on the upper surface of the filter plate 33 to clean impurities. The impurities on the filter plate 33 are guided by the spiral strips 49 and finally enter the dirt collecting box 52 from the dirt outlet 53. When the impurities in the dirt collecting box 52 are full, the dirt collecting box 52 can be taken out by sliding and replaced with an empty dirt collecting box 52.

[0061] S4: When the water quality needs to be improved, the sealing cover 510 is opened, and the agent for improving the quality of filtered water is added from the dispensing port 59. The sealing cover 510 is closed, and the water in the dispensing box 55 together with the impurities enters the scale collecting box 52 and enters the dispensing box 55 from the guide cover 56 after being filtered by the filter net 54, so that the agent for improving the water quality added from the dispensing port 59 is mixed with the cooling water in the dispensing box 55, and after being filtered by the filter net 58, the dissolved agent is brought into the water outlet branch pipe 23 through the connecting pipe 57 to improve the water quality.

[0062] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A nuclear power generation cooling water circulation filtering device, comprising a mounting cover (11) and supporting legs (12) uniformly arranged circumferentially at the lower end of the mounting cover (11), characterized in that: A water inlet pipe (13) and a water outlet pipe (14) are respectively arranged at the middle of the top end and the bottom end of the installation cover (11), and the water inlet pipe (13) and the water outlet pipe (14) are both connected to the inside of the installation cover (11). An operation port (15) is provided on the side wall of the installation cover (11), and a protective door (16) for closing the operation port (15) is also slidably installed on the side wall of the installation cover (11). A flow guide device (2) is also arranged inside the installation cover (11).

2. A nuclear power generation cooling water circulation filtration device according to claim 1, characterized in that: The flow guide device (2) comprises a rotating sleeve (21) rotatably mounted on the lower end of the water inlet pipe (13) and the upper end of the water outlet pipe (14), and the side ends of the rotating sleeve (21) are symmetrically connected to the water inlet pipe (13) and the water outlet pipe (14) in the circumferential direction, respectively. A control valve (24) is mounted on the water inlet branch pipe (22), and an upper filter cover (25) is arranged at the lower end of each water inlet branch pipe (22). A lower filter cover (26) is slidably mounted on the upper end of each water outlet branch pipe (23), and the upper filter cover (25) corresponds to the lower filter cover (26) one by one.

3. A nuclear power generation cooling water circulation filtration device according to claim 2, characterized in that: A water filter device (3) is arranged inside the lower filter cover (26), and the water filter device (3) comprises a mounting ring (31) arranged at the upper end of the lower filter cover (26), a collector tube (32) is installed inside the mounting ring (31), and a slope inclined downward toward the middle of the collector tube (32) is arranged at the lower end of the collector tube (32), a filter plate (33) is installed at the upper end of the collector tube (32), and a connecting pipe (34) is arranged at the lower end of the collector tube (32), and the connecting pipe (34) is connected to the water outlet branch pipe (23).

4. A nuclear power generation cooling water circulation filtration device according to claim 3, characterized in that: A mixing device (5) is arranged inside the lower filter cover (26), and the mixing device (5) comprises a mounting opening (51) provided on the side wall of the lower filter cover (26), a dirt collecting box (52) is slidably connected to the mounting opening (51), a dirt outlet (53) is provided at one end of the mounting ring (31), a filter screen (54) is arranged at one end of the dirt collecting box (52) facing the lower filter cover (26), and a medicine dispensing box (55) is arranged at the lower end of the lower filter cover (26), and the medicine dispensing box (55) is connected to the lower filter cover (26). One side of the filter screen (54) of the dirt collecting box (52) is connected via a flow guide cover (56); a connecting pipe (57) is installed on the side wall of the medicine dispensing box (55) facing the connecting pipe (57); the connecting pipe (57) connects the medicine dispensing box (55) with the water outlet branch pipe (23); a medicine filter screen (58) is also arranged on the connecting pipe (57); a medicine dispensing port (59) is opened at the upper end of the side wall of the medicine dispensing box (55) away from the connecting pipe (57); a sealing cover (510) is installed on the medicine dispensing port (59).

5. A nuclear power generation cooling water circulation filtration device according to claim 2, characterized in that: A cleaning device (4) is arranged inside the upper filter cover (25), and the cleaning device (4) comprises a mounting seat (41) mounted on the upper end of the upper filter cover (25), a rotating tube (42) is rotatably mounted on the lower end of the mounting seat (41), and the water inlet branch pipe (22) is connected to the rotating tube (42), and a plurality of groups of arc-shaped guide tubes (43) distributed vertically and evenly arranged in the circumferential direction are arranged on the outer side wall of the lower end of the rotating tube (42), and the arc-shaped guide tubes (43) are connected to the rotating tube (42), and the bottom end of the rotating tube (42) is connected to a connecting column (44), and the lower end of the connecting column (44) is A plurality of circumferentially distributed rotating plates (45) are evenly arranged, a connecting ring (46) is arranged at the lower end of the upper filter cover (25), and one end of the rotating plate (45) away from the connecting column (44) is slidably arranged on the upper end of the connecting ring (46), a cleaning brush (47) is arranged at the lower end of the rotating plate (45), a connecting shaft (48) is also arranged at the bottom end of the connecting column (44), a spiral strip (49) is installed between the connecting shaft (48) and the connecting ring (46), the spiral strip (49) is located on the upper end surface of the filter plate (33), and the middle part of the spiral strip (49) is rotatably installed on the lower end of the connecting shaft (48).

6. A nuclear power generation cooling water circulation filtration device according to claim 2, characterized in that: The upper filter cover (25) and the lower filter cover (26) are provided with a locking device (8), the locking device (8) comprising an assembly ring (81) arranged on the outer side wall of the lower end of the upper filter cover (25), a plurality of mounting plates (82) are evenly arranged on the side wall of the assembly ring (81) in a circumferential direction, the mounting plates (82) are provided with mounting grooves (83), the mounting grooves (83) are slidably connected with a sliding ring (84), and a sliding handle (85) is installed on the side end of the sliding ring (84). A plurality of mounting blocks (86) are evenly arranged on the side wall at the lower end of the assembly ring (81), a positioning frame (87) is rotatably mounted on the mounting block (86), a positioning hook (88) is arranged at the lower end of the positioning frame (87), a positioning ring (89) is arranged at the upper end of the outer wall of the lower filter cover (26), the upper end of the positioning frame (87) is inclined toward the outer side of the upper filter cover (25), and a sliding hole (810) is opened in the inclined part, and the assembly ring (81) slides inside the sliding hole (810).

7. A nuclear power generation cooling water circulation filtration device according to claim 2, characterized in that: The lower end of the lower filter cover (26) is provided with a connecting device (6), and the connecting device (6) comprises a rotating plate (61) mounted on a rotating sleeve (21) located at the upper end of the water outlet pipe (14). The outer periphery of the rotating plate (61) is connected to a rotating ring (62). The upper end of the rotating plate (61) is provided with a plurality of adjusting sleeves (63), and the adjusting sleeves (63) are located in the middle of the lower end of the lower filter cover (26). The lower end of the lower filter cover (26) is provided with a sliding sleeve (64), and the sliding sleeve (64) is slidably connected to the adjusting sleeve (63). The lower end of the lower filter cover (26) is evenly provided with a plurality of sliding cylinders (65) in the circumferential direction. The rotating plate (61) is provided with sliding columns (66) respectively slidably connected to the sliding cylinders (65). A connecting spring (67) is provided inside the sliding cylinder (65), and the connecting spring (67) connects the sliding cylinder (65) and the sliding column (66).

8. A nuclear power generation cooling water circulation filtration device according to claim 7, characterized in that: The upper end of the rotating plate (61) is also provided with an adjusting device (7), the adjusting device (7) comprising a plurality of adjusting frames (71) mounted on the upper end of the rotating plate (61), and the positions of the adjusting frames (71) respectively correspond to the adjusting sleeves (63), a gear shaft (72) is rotatably mounted on the upper end of the adjusting frame (71), an adjusting gear (73) is mounted on one end of the gear shaft (72) facing the adjusting sleeve (63), an adjusting rack (74) is arranged on the sliding cylinder (65) beside the adjusting frame (71), and the adjusting gear (73) and the adjusting rack (74) are connected to each other. The rotating plate (61) and the adjusting sleeve (63) are meshed with each other. A plurality of mounting frames (75) are also arranged on the upper end of the rotating plate (61), and the positions of the mounting frames (75) correspond to the adjusting sleeves (63) respectively. An L-shaped bar (76) is rotatably mounted on the mounting frame (75). A locking spring (77) is connected to the rotating plate (61) at the lower end of the L-shaped bar (76). A locking protrusion (78) is arranged on the upper end of the L-shaped bar (76). A locking tooth (79) is arranged on the sliding cylinder (65) next to the mounting frame (75), and the locking protrusion (78) matches the locking tooth (79).

9. A method for circulating and filtering cooling water for nuclear power generation, comprising a circulating and filtering device for cooling water for nuclear power generation as claimed in any one of claims 1 to 8, characterized in that: The filtering method includes the following steps: S1: Open the protection door (16), rotate the rotating ring (62) to rotate the rotating plate (61), rotate the lower filter cover (26) of the filter plate (33) to be replaced to the side of the operating port (15), ensure that the control valve (24) facing the operating port (15) is closed, push the sliding handle (85) to slide the sliding ring (84) upward, and then press down the lower end of the L-shaped strip (76) corresponding to the lower filter cover (26), and the lower filter cover (26) moves downward; S2: Remove the filter plate (33) in the lower filter cover (26), install a new filter plate (33) on the upper end of the collector tube (32), turn the gear shaft (72) clockwise facing the adjustment frame (71), and move the lower filter cover (26) upward, and finally make the locking hook (88) hook the locking ring (89) to connect the upper filter cover (25) with the lower filter cover (26); S3: Open the control valve (24) to allow cooling water to flow out of the arc-shaped guide tube (43), and drive the cleaning brush (47) to rotate through the rotating tube (42). The impurities on the filter plate (33) are guided by the spiral strips (49) and finally enter the dirt collecting box (52) from the dirt outlet (53). When the dirt collecting box (52) is full of impurities, the dirt collecting box (52) can be taken out by sliding and replaced with an empty dirt collecting box (52). S4: When it is necessary to improve the water quality, the sealing cover (510) is opened, and a medicine for improving the quality of the filtered water is added from the medicine dispensing port (59). The sealing cover (510) is closed, and the water in the medicine dispensing box (55) and the impurities enter the dirt collecting box (52) through the guide cover (56) and enter the medicine dispensing box (55), and the medicine is brought into the water outlet branch pipe (23) through the connecting pipe (57) to improve the water quality.

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